A number of species were inadvertently omitted that should have been included in the original table {Table 2.14}. Minor typographical errors (unit, superscripts, and footnotes) have also been corrected. Please see end of this Errata for the complete table {Table 2.14 Errata}

A number of species were inadvertently omitted that should have been included in the original table. Minor typographical errors (unit, superscripts, and footnotes) have also been corrected. Please see end of this Errata for the complete table. {Table 2.14 Errata}

The caption should read:
“...while the other studies use uniform prior distributions of ECS, except for Gregory et al. (2002a) who implicitly use a uniform prior on transient climate response (see Frame et al., 2005), and Annan et al. (2005) who select a range based on sampling uncertain parameters in their model.”

Table 2.14 (Errata). Lifetimes, radiative efficiencies and direct (except for CH4) GWPs relative to CO2. For ozone-depleting substances and their replacements, data are taken from IPCC/TEAP (2005) unless otherwise stated. See IPCC AR4 (Forster et al., 2007; Section 2.10.2 and Table 2.14) for details. A number of species were inadvertently omitted that should have been included in the list, and the complete table appears below. Information on the GWPs of these species were included in IPCC TAR (Ramaswamy et al., 2001;Tables 6.7 and 6.8). These species are now included in this Errata to Table 2.14 of IPCC AR4 (Forster et al., 2007), following established procedures and precedents. CO2 AGWP values from IPCC AR4 (Forster et al., 2007; Section 2.10.2), and estimates of the lifetimes and radiative efficiency of these species (based on TAR and updates from WMO (2002, Chapter 1)), are employed to obtain their GWPs. Estimates of GWPs from SAR‡ are also listed for reference. Minor typographical errors (unit, parenthesis, superscripts, and footnotes) have also been corrected in this Errata.

Global Warming Potential For Given Time Horizon

Industrial Designation or Common Name

Chemical Formula

Lifetime (years)

Radiative Efficiency (W m–2 ppb–1)

SAR‡ (100-yr)

20-yr

100-yr

500-yr

Carbon dioxide

CO2

See belowa

b1.4x10–5

1

1

1

1

Methanec

CH4

12c

3.7x10–4

21

72

25

7.6

Nitrous oxide

N2O

114

3.03x10–3

310

289

298

153

Substances controlled by the Montreal Protocol

CFC-11

CCl3F

45

0.25

3,800

6,730

4,750

1,620

CFC-12

CCl2F2

100

0.32

8,100

11,000

10,900

5,200

CFC-13

CClF3

640

0.25

10,800

14,400

16,400

CFC-113

CCl2FCClF2

85

0.3

4,800

6,540

6,130

2,700

CFC-114

CClF2CClF2

300

0.31

8,040

10,000

8,730

CFC-115

CClF2CF3

1,700

0.18

5,310

7,370

9,990

Halon-1301

CBrF3

65

0.32

5,400

8,480

7,140

2,760

Halon-1211

CBrClF2

16

0.3

4,750

1,890

575

Halon-2402

CBrF2CBrF2

20

0.33

3,680

1,640

503

Carbon tetrachloride

CCl4

26

0.13

1,400

2,700

1,400

435

Methyl bromide

CH3Br

0.7

0.01

17

5

1

Methyl chloroform

CH3CCl3

5

0.06

100*

506

146

45

HCFC-21

CHCl2F

1.7

0.14

530

151

46

HCFC-22

CHClF2

12

0.2

1,500

5,160

1,810

549

HCFC-123

CHCl2CF3

1.3

0.14

90

273

77

24

HCFC-124

CHClFCF3

5.8

0.22

470

2,070

609

185

HCFC-141b

CH3CCl2F

9.3

0.14

600

2,250

725

220

HCFC-142b

CH3CClF2

17.9

0.2

1,800

5,490

2,310

705

HCFC-225ca

CHCl2CF2CF3

1.9

0.2

429

122

37

HCFC-225cb

CHClFCF2CClF2

5.8

0.32

2,030

595

181

Hydrofluorocarbons

HFC-23

CHF3

270

0.19

11,700

12,000

14,800

12,200

HFC-32

CH2F2

4.9

0.11

650

2,330

675

205

HFC-41

CH3F

2.4

0.02

150

323

92

28

HFC-125

CHF2CF3

29

0.23

2,800

6,350

3,500

1,100

HFC-134

CHF2CHF2

9.6

0.18

1000

3,400

1,100

335

HFC-134a

CH2FCF3

14

0.16

1,300

3,830

1,430

435

HFC-143

CH2FCHF2

3.5

0.13

300

1,240

353

107

HFC-143a

CH3CF3

52

0.13

3,800

5,890

4,470

1,590

HFC-152

CH2FCH2F

0.60

0.09

187

53

16

HFC-152a

CH3CHF2

1.4

0.09

140

437

124

38

HFC-161

CH3CH2F

0.3

0.03

43

12

3.7

HFC-227ea

CF3CHFCF3

34.2

0.26

2,900

5,310

3,220

1,040

HFC-236cb

CH2FCF2CF3

13.6

0.23

3,630

1,340

407

HFC-236ea

CHF2CHFCF3

10.7

0.3

4,090

1,370

418

HFC-236fa

CF3CH2CF3

240

0.28

6,300

8,100

9,810

7,660

HFC-245ca

CH2FCF2CHF2

6.2

0.23

560

2,340

693

211

HFC-245fa

CHF2CH2CF3

7.6

0.28

3,380

1,030

314

HFC-365mfc

CH3CF2CH2CF3

8.6

0.21

2,520

794

241

HFC-43-10mee

CF3CHFCHFCF2CF3

15.9

0.4

1,300

4,140

1,640

500

Global Warming Potential For Given Time Horizon

Industrial Designation or Common Name

Chemical Formula

Lifetime (years)

Radiative Efficiency (W m–2 ppb–1)

SAR‡ (100-yr)

20-yr

100-yr

500-yr

Perfluorinated compounds

Sulphur hexafluoride

SF6

3,200

0.52

23,900

16,300

22,800

32,600

Nitrogen trifluoride

NF3

740

d0.21

12,300

17,200

20,700

PFC-14

CF4

50,000

e0.10

6,500

5,210

7,390

11,200

PFC-116

C2F6

10,000

0.26

9,200

8,630

12,200

18,200

PFC-218

C3F8

2,600

0.26

7,000

6,310

8,830

12,500

PFC-318

c-C4F8

3,200

0.32

8,700

7,310

10,300

14,700

PFC-3-1-10

C4F10

2,600

0.33

7,000

6,330

8,860

12,500

PFC-4-1-12

C5F12

4,100

0.41

7,500

6,510

9,160

13,300

PFC-5-1-14

C6F14

3,200

0.49

7,400

6,600

9,300

13,300

PFC-9-1-18

C10F18

>1,000f

0.56

>5,500

>7,500

>9,500

trifluoromethyl sulphur pentafluoride

SF5CF3

800

0.57

13,200

17,700

21,200

Perfluorocyclopropane

c-C3F6

>1000

0.42

>12,700

>17,340

>21,800

Fluorinated ethers

HFE-125

CHF2OCF3

136

0.44

13,800

14,900

8,490

HFE-134

CHF2OCHF2

26

0.45

12,200

6,320

1,960

HFE-143a

CH3OCF3

4.3

0.27

2,630

756

230

HCFE-235da2

CHF2OCHClCF3

2.6

0.38

1,230

350

106

HFE-245cb2

CH3OCF2CF3

5.1

0.32

2,440

708

215

HFE-245fa2

CHF2OCH2CF3

4.9

0.31

2,280

659

200

HFE-254cb2

CH3OCF2CHF2

2.6

0.28

1,260

359

109

HFE-347mcc3

CH3OCF2CF2CF3

5.2

0.34

1,980

575

175

HFE-347pcf2

CHF2CF2OCH2CF3

7.1

0.25

1,900

580

175

HFE-356pcc3

CH3OCF2CF2CHF2

0.33

0.93

386

110

33

HFE-449sl (HFE-7100)

C4F9OCH3

3.8

0.31

1,040

297

90

HFE-569sf2 (HFE-7200)

C4F9OC2H5

0.77

0.3

207

59

18

HFE-43-10pccc124 (H-Galden 1040x)

CHF2OCF2OC2F4OCHF2

6.3

1.37

6,320

1,870

569

HFE-236ca12 (HG-10)

CHF2OCF2OCHF2

12.1

0.66

8,000

2,800

860

HFE-338pcc13 (HG-01)

CHF2OCF2CF2OCHF2

6.2

0.87

5,100

1,500

460

(CF3)2CFOCH3

3.4

0.31

1204

343

104

CF3CF2CH2OH

0.4

0.24

147

42

13

(CF3)2CHOH

1.8

0.28

687

195

59

HFE-227ea

CF3CHFOCF3

11

0.40

4,540

1,540

468

HFE-236ea2

CHF2OCHFCF3

5.8

0.44

3,370

989

301

HFE-236fa

CF3CH2OCF3

3.7

0.34

1,710

487

148

HFE-245fa1

CHF2CH2OCF3

2.2

0.30

1,010

286

87

HFE 263fb2

CF3CH2OCH3

0.2

0.1

38

11

3

HFE-329mcc2

CHF2CF2OCF2CF3

6.8

0.49

3,060

919

279

HFE-338mcf2

CF3CH2OCF2CF3

4.3

0.43

1,920

552

168

HFE-347mcf2

CHF2CH2OCF2CF3

2.8

0.41

1,310

374

114

HFE-356mec3

CH3OCF2CHFCF3

0.94

0.30

355

101

31

HFE-356pcf2

CHF2CH2OCF2CHF2

2.0

0.37

931

265

80

HFE-356pcf3

CHF2OCH2CF2CHF2

3.6

0.39

1,760

502

153

HFE 365mcf3

CF3CF2CH2OCH3

0.27

0.11

41

11

4

Global Warming Potential For Given Time Horizon

Industrial Designation or Common Name

Chemical Formula

Lifetime (years)

Radiative Efficiency (W m–2 ppb–1)

SAR‡ (100-yr)

20-yr

100-yr

500-yr

Fluorinated ethers (continued)

HFE-374pc2

CHF2CF2OCH2CH3

5.0

0.25

1,930

557

169

- (CF2)4CH (OH) -

0.3

0.85

258

73

23

(CF3)2CHOCHF2

3.1

0.41

1,330

380

115

(CF3)2CHOCH3

0.25

0.30

94

27

8.2

Perfluoropolyethers

PFPMIE

CF3OCF(CF3)CF2OCF2OCF3

800

0.65

7,620

10,300

12,400

Hydrocarbons and other compounds – Direct Effects

Dimethylether

CH3OCH3

0.015

0.02

1

1

<<1

Chloroform

CHCl3

0.51

0.11

4

108

31

9.3

Methylene chloride

CH2Cl2

0.38

0.03

9

31

8.7

2.7

Methyl chloride

CH3Cl

1.0

0.01

45

13

4

CH2Br2

0.41

0.01

5.4

1.54

0.47

Halon-1201

CHBrF2

5.8

0.14

1,380

404

123

Trifluoroiodomethane

CF3I

0.005

0.23

<1

1

0.4

0.1

Notes:

a The CO2 response function used in this report is based on the revised version of the Bern Carbon cycle model used in Chapter 10 of this report (Bern2.5CC; Joos et al. 2001) using a background CO2 concentration value of 378 ppm. The decay of a pulse of CO2 with time t is given by

b The radiative efficiency of CO2 is calculated using the IPCC (1990) simplified expression as revised in the TAR, with an updated background concentration value of 378 ppm and a perturbation of +1 ppm (see Section 2.10.2).

c The perturbation lifetime for methane is 12 years as in the TAR (see also Section 7.4). The GWP for methane includes indirect effects from enhancements of ozone and stratospheric water vapour (see Section 2.10.3.1).

d Robson et al. (2006)

e Hurley et al. (2005)

f Shine et al. (2005c), updated by the revised AGWP for CO2. The assumed lifetime of 1,000 years is a lower limit.

Frequently Asked Question 2.1, Figure 1 (Errata)

FAQ 2.1, Figure 1 (Errata). Revised figure showing atmospheric concentrations of important long-lived greenhouse gases over the last 2,000 years. Using the combined and simplified data from Chapters 6 and 2, the original figure displayed the CH4 curve incorrectly. The revised figure shows the same data correctly plotted. For further details please refer to the original figure caption.